Bicycle



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G. MAKRIS May 31, 1927.

BICYCLE Filed July '49, 1926 G. Iva/Kris.

Patented May 31, 192 7. r

MAKRrs; or MASSILLONQYOHIOY vnated as velocipedes.

k GEORGE IBICYQLE;

' Application filed Jilly 29,1926. seriai'ivofiiaatss.

This invention relates to I vehicles and r 1 more particularly to the type adapted to be manually propelled and generally desig- The invention provides bicycle type embodying a frame ofpecuhar construction and a novel arrangement of gearing whereby the speed is stepped up.

While the drawings illustrate a preferred embodiment of the invention. it is to be understood that in adapting. the m cansto meet specific needs and requirements, the design may as; varied and such changes in the minor details of construction may be resorted to withinthe scope of the l ering plate being" broken away; and

Figure 2 is a detail plan sectional view on the line 2-2of Figure 1.

Corresponding and like parts. are referred to in the following description and designated 1n the two Views ofthe drawings, by

like reference characters.

- The frame of the bicycle comprises an upper reach 1, a lower reach 2, having its front portion curved upwardly and for wardly, as indicated at 3, a rear fork 4 and :1 head tube 5 connecting the upper reachl and the curved portion 8 of the lower reach 2.- The frame is strengthened by means of a- Y-brace comprising the oppositely inclined members 6 and 7 and the vertical member 8. Theinclined member 6 of the Y-brace receives the seat post 9 to which the seat- 10 is connected in-the, usual way.-

T he several parts 1(4 and 6 may be connected by. means of a cluster, or In any preferred way common in the art.

' [ing the frame, provides substantial support ing' means for the train of gearing whereby the speed is stepped up. The steering fork 11 is mounted in the head tube 5 in any usual or determinate way and receives the steering post 12 to which the handle bar 13 is connected;v The'train of gearing is dis- -posed within'vthe outline of the frame and is enclosed by covering plates 14 which are connected at their marginal edges to mema vehicle of the othc r the inven-v V V The Y brace, in" addition to stiffening and re1nforc bers of th-e frame in a manner to form a housing LNVhlCh encloses the gearing; A;

connects the forward'portion of the part 3 Iyyith7the'upper portion of the inclined mem er The front wheel 19 is mounted ,in the curved bar17 connects the lower reach Y I withtherear fork 4 and therear portion of the housing is connected thereto; A stay 18.

steering fork .11 and the rear Wheel 20 to which the powernis' applied; is mounted in the fork of the lower reach 2 and the memberi. crank hanger disposed at thcintersection shaft 21 and a sprocket wheel 23 is likewise fast to thecrank shaft'21. 'Anfaxle 24 is disposed in the length of the member 7 at the juncture of the stay 18 therewith. An

The crankshaft 21 is mounted in aof the several members 6, 7 and 8," of the vY-brace. A flv-wheel 22 is fast-to the crank axle 25 is located in the length of the mem ber 6.

means of a sprocket chain '28 with the sprocket wheel 23. Connected sprocket wheels 29 and 30'aremounted upon the axle.

25 and the sprocket wheel 29 is connected by means of sprocket chains 31 with the sprocket wheel 27. a A sprocket wheel 32 fast to the axle of the rear wheel'20 is con- 7 Connected sprocket wheels 26 and r 27 are mounted upon the axle 24, the sprocket wheel 26 being connected by ss-Z y nected by means of a sprocket chain 33 with v the sprocket wheel 30. The crank shaft 21 is provided at opposite ends with crank arms 34 which are'equippe'd with pedals to receive the feet of thedriver.

It will be readily understood from foregoing, taken in connection with the accompanying drawings that the frame of the vehicle is strengthened and braced and the bracingmeans provides a convenient and substantial support/for the train of gearing,

which is such as to admit of the speed be:

ing augmented, and the gearingbeing'com pletely enclosed and protec'tec. 1 I r claim: t In a. bicycle, a frame comprising an upper reach, a lower reachhavmg its front the - Having thus described theinvention, I

portion curved upwardly-and forwardly,. a

head tube connecting the front ends of the I reaches, a fork connecting the rear ends of the reaches, a Y-brace having its vertical-- 2 member connected to the lower reach and its inclinedmembers to opposite ends of'the upper reachya stay connectingthe'upper curved port-i011- of v the loweiviiea chwith the 1 :Iined mrhbrs of the Y-brace, and cov e 1- I V forward inclined member oftheiY-btacg and irig" plates-atthe sides f the frame and a cfllvd fl Connecting the l owrf reach connected at their marginal edgesio memwith the said fork, a cmn k shaft mounted-berg of thefr'al me. j 7 ,7 f

P t e Y -bra c'e at th t e t Of ;In testimony whereof I afiix my signature.

sevra'l members, air-min of gearing include? Y ing V sprocket wheels; D'lQuDtGld upon the-in s.] 1 J 

